<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="./作业.js"></script>
</head>

<body>
  <button>发起请求</button>
  <h1></h1>
  <script>
    document.querySelector('button').addEventListener('click',()=>{
      Promise.all([
        myAjax({
          method: 'GET',
          url: 'http://www.liulongbin.top:3006/api/getbooks'
        }),
        myAjax({
          method: 'GET',
          url: 'http://www.liulongbin.top:3006/api/getbooks'
        }),
        myAjax({
          method: 'GET',
          url: 'http://www.liulongbin.top:3006/api/getbooks'
        })])
        .then(res => {
          document.querySelector('h1').innerHTML = '我是主页'
        })
        .catch(err => {
          document.querySelector('h1').innerHTML = `${err}`
        })
    })
  </script>
</body>

</html>